Mercurial > hg > orthanc-databases
annotate Framework/MySQL/MySQLResult.cpp @ 359:16aac0287485
copyright upgraded to 2022
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 21 Feb 2022 09:32:46 +0100 |
parents | c82c2cf84ae8 |
children | 3d6886f3e5b3 |
rev | line source |
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0 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
0 | 7 * |
8 * This program is free software: you can redistribute it and/or | |
9 * modify it under the terms of the GNU Affero General Public License | |
10 * as published by the Free Software Foundation, either version 3 of | |
11 * the License, or (at your option) any later version. | |
12 * | |
13 * This program is distributed in the hope that it will be useful, but | |
14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 * Affero General Public License for more details. | |
17 * | |
18 * You should have received a copy of the GNU Affero General Public License | |
19 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 **/ | |
21 | |
22 | |
23 #include "MySQLResult.h" | |
24 | |
152 | 25 #include <Logging.h> |
26 #include <OrthancException.h> | |
0 | 27 |
6 | 28 #include <errmsg.h> |
0 | 29 #include <mysqld_error.h> |
30 | |
31 namespace OrthancDatabases | |
32 { | |
33 void MySQLResult::Step() | |
34 { | |
35 int code = mysql_stmt_fetch(statement_.GetObject()); | |
36 | |
37 if (code == 1) | |
38 { | |
39 unsigned int error = mysql_errno(database_.GetObject()); | |
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40 |
0 | 41 if (error == 0) |
42 { | |
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43 // This case occurs in requests without a result (e.g. if the |
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44 // SQL request is not a SELECT) |
0 | 45 done_ = true; |
46 } | |
47 else | |
48 { | |
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49 database_.ThrowException(); |
0 | 50 } |
51 } | |
52 else | |
53 { | |
54 done_ = (code != 0 && | |
55 code != MYSQL_DATA_TRUNCATED); // Occurs if mysql_stmt_fetch_column() must be called | |
56 | |
57 FetchFields(); | |
58 } | |
59 } | |
60 | |
61 | |
62 IValue* MySQLResult::FetchField(size_t index) | |
63 { | |
64 return statement_.FetchResultField(index); | |
65 } | |
66 | |
67 | |
68 MySQLResult::MySQLResult(MySQLDatabase& db, | |
69 MySQLStatement& statement) : | |
70 database_(db), | |
71 statement_(statement) | |
72 { | |
73 // !!! https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-fetch.html | |
74 // https://gist.github.com/hoterran/6365915 | |
75 // https://github.com/hholzgra/connector-c-examples/blob/master/mysql_stmt_bind_result.c | |
76 | |
77 SetFieldsCount(statement_.GetResultFieldsCount()); | |
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78 |
0 | 79 Step(); |
80 } | |
81 | |
82 | |
83 MySQLResult::~MySQLResult() | |
84 { | |
85 // Reset the statement for further use | |
86 if (mysql_stmt_reset(statement_.GetObject()) != 0) | |
87 { | |
88 LOG(ERROR) << "Cannot reset the statement, expect an error"; | |
89 } | |
90 } | |
91 | |
92 | |
93 void MySQLResult::Next() | |
94 { | |
95 if (IsDone()) | |
96 { | |
97 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
98 } | |
99 else | |
100 { | |
101 Step(); | |
102 } | |
103 } | |
104 } |